Dairy consumption and lung cancer risk: a meta-analysis of prospective cohort studies

Background: Lung cancer risk is the leading cause of cancer-related deaths worldwide. We conducted a meta-analysis to evaluate the relationship between dairy consumption and lung cancer risk. Methods: The databases included EMBASE, Medline (PubMed), and Web of Science. The relationship between dairy consumption and lung cancer risk was analyzed by relative risk or odds ratio estimates with 95% confidence intervals (CIs). We identified eight prospective cohort studies, which amounted to 10,344 cases and 61,901 participants. Results: For milk intake, relative risk was 0.95 (95% CI: 0.76-1.15); heterogeneity was 70.2% (P=0.003). For total dairy product intake, relative risk was 0.96 (95% CI: 0.89-1.03), heterogeneity was 68.4% (P=0.004). Conclusion: There was no significant association between dairy consumption and lung cancer risk.